CVE-2026-43403

HIGH EPSS 2.9%
Published May 8, 20261mo ago · Modified Jun 17, 20261w ago
8.8 CVSS 3.1
High
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: nsfs: tighten permission checks for ns iteration ioctls Even privileged services should not necessarily be able to see other privileged service's namespaces so they can't leak information to each other. Use may_see_all_namespaces() helper that centralizes this policy until the nstree adapts.

CVSS Details

Base Score
8.8
Exploitability
2.0
Impact
6.0
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
2.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥6.12  –  <6.12.78
linuxlinux_kernel*≥6.13  –  <6.18.20
linuxlinux_kernel*≥6.19  –  <6.19.9
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/0ad650e60150eda789deca5e78a6a09d26bf8fc9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f3dea284c761c890d676f77d5e55c0c496b4ef4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3376b345df155ca36d8611857b41ff7d5183fc38
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e6b899f08066e744f89df16ceb782e06868bd148
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0ad650e60150eda789deca5e78a6a09d26bf8fc9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f3dea284c761c890d676f77d5e55c0c496b4ef4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3376b345df155ca36d8611857b41ff7d5183fc38
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e6b899f08066e744f89df16ceb782e06868bd148
    Patch